Index: clang-tools-extra/trunk/clang-tidy/fuchsia/MultipleInheritanceCheck.cpp
===================================================================
--- clang-tools-extra/trunk/clang-tidy/fuchsia/MultipleInheritanceCheck.cpp
+++ clang-tools-extra/trunk/clang-tidy/fuchsia/MultipleInheritanceCheck.cpp
@@ -30,6 +30,7 @@
 // previously.
 void MultipleInheritanceCheck::addNodeToInterfaceMap(const CXXRecordDecl *Node,
                                                      bool isInterface) {
+  assert(Node->getIdentifier());
   StringRef Name = Node->getIdentifier()->getName();
   InterfaceMap.insert(std::make_pair(Name, isInterface));
 }
@@ -39,6 +40,7 @@
 // interface status for the current node is not yet known.
 bool MultipleInheritanceCheck::getInterfaceStatus(const CXXRecordDecl *Node,
                                                   bool &isInterface) const {
+  assert(Node->getIdentifier());
   StringRef Name = Node->getIdentifier()->getName();
   llvm::StringMapConstIterator<bool> Pair = InterfaceMap.find(Name);
   if (Pair == InterfaceMap.end())
@@ -59,6 +61,9 @@
 }
 
 bool MultipleInheritanceCheck::isInterface(const CXXRecordDecl *Node) {
+  if (!Node->getIdentifier())
+    return false;
+
   // Short circuit the lookup if we have analyzed this record before.
   bool PreviousIsInterfaceResult;
   if (getInterfaceStatus(Node, PreviousIsInterfaceResult))
Index: clang-tools-extra/trunk/test/clang-tidy/fuchsia-multiple-inheritance.cpp
===================================================================
--- clang-tools-extra/trunk/test/clang-tidy/fuchsia-multiple-inheritance.cpp
+++ clang-tools-extra/trunk/test/clang-tidy/fuchsia-multiple-inheritance.cpp
@@ -134,3 +134,14 @@
 
 template<typename> struct C {};
 template<typename T> struct D : C<T> {};
+
+// Check clang_tidy does not crash on this code.
+template <class T>
+struct WithTemplBase : T {
+  WithTemplBase();
+};
+
+int test_no_crash() {
+  auto foo = []() {};
+  WithTemplBase<decltype(foo)>();
+}